From b33df471d8eab548af633a4ef33f5a1ec5a1fdc6 Mon Sep 17 00:00:00 2001
From: Brian Miyaji <brian@themeboy.com>
Date: Sun, 21 Aug 2016 15:42:30 +1000
Subject: [PATCH] Enable meta query vars in REST API

---
 includes/api/class-sp-rest-api.php | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/includes/api/class-sp-rest-api.php b/includes/api/class-sp-rest-api.php
index bcc3a8a7..1b5951c4 100644
--- a/includes/api/class-sp-rest-api.php
+++ b/includes/api/class-sp-rest-api.php
@@ -28,6 +28,9 @@ class SP_REST_API {
 		// Create REST routes
 		add_action( 'rest_api_init', array( $this, 'create_routes' ) );
 		add_action( 'rest_api_init', array( $this, 'register_fields' ), 0 );
+		
+		// Add filter for post meta query
+		add_filter( 'rest_query_vars', array( $this, 'meta_query' ) );
 	}
 
 	/**
@@ -750,6 +753,14 @@ class SP_REST_API {
 		
 		return $field_name;
 	}
+	
+	/**
+	 * Enable meta query vars
+	 */
+	public static function meta_query( $valid_vars ) {
+		$valid_vars = array_merge( $valid_vars, array( 'meta_key', 'meta_value', 'meta_query' ) );
+		return $valid_vars;
+	}
 }
 
 endif;